linux-kernel - Re: [PATCH] ALSA: aoa: convert bus code to use dev

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Date:	Thu, 28 May 2015 15:52:48 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Quentin Lambert <lambert.quentin@...il.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	Jaroslav Kysela <perex@...ex.cz>,
	linuxppc-dev@...ts.ozlabs.org, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] ALSA: aoa: convert bus code to use dev_groups

At Thu, 28 May 2015 14:48:27 +0200,
Quentin Lambert wrote:
> 
> You should use dev_groups instead of the dev_attrs field of struct
> bus_type. This converts the MDIO bus code to use the correct field.
> 
> These modifications were made using Coccinelle.
> 
> Signed-off-by: Quentin Lambert <lambert.quentin@...il.com>

What's wrong with dev_attrs?
(Not offending, I'm just curious where the preference for dev_groups
 is referred...)


thanks,

Takashi

> ---
>  sound/aoa/soundbus/core.c     |    3 ++-
>  sound/aoa/soundbus/soundbus.h |    2 +-
>  sound/aoa/soundbus/sysfs.c    |   13 ++++++++-----
>  3 files changed, 11 insertions(+), 7 deletions(-)
> 
> --- a/sound/aoa/soundbus/core.c
> +++ b/sound/aoa/soundbus/core.c
> @@ -150,6 +150,7 @@ static int soundbus_device_resume(struct
>  
>  #endif /* CONFIG_PM */
>  
> +ATTRIBUTE_GROUPS(soundbus_dev);
>  static struct bus_type soundbus_bus_type = {
>  	.name		= "aoa-soundbus",
>  	.probe		= soundbus_probe,
> @@ -160,7 +161,7 @@ static struct bus_type soundbus_bus_type
>  	.suspend	= soundbus_device_suspend,
>  	.resume		= soundbus_device_resume,
>  #endif
> -	.dev_attrs	= soundbus_dev_attrs,
> +	.dev_groups	= soundbus_dev_groups,
>  };
>  
>  int soundbus_add_one(struct soundbus_dev *dev)
> --- a/sound/aoa/soundbus/soundbus.h
> +++ b/sound/aoa/soundbus/soundbus.h
> @@ -199,6 +199,6 @@ struct soundbus_driver {
>  extern int soundbus_register_driver(struct soundbus_driver *drv);
>  extern void soundbus_unregister_driver(struct soundbus_driver *drv);
>  
> -extern struct device_attribute soundbus_dev_attrs[];
> +extern struct attribute *soundbus_dev_attrs[];
>  
>  #endif /* __SOUNDBUS_H */
> --- a/sound/aoa/soundbus/sysfs.c
> +++ b/sound/aoa/soundbus/sysfs.c
> @@ -30,13 +30,16 @@ static ssize_t modalias_show(struct devi
>  
>  	return length;
>  }
> +static DEVICE_ATTR_RO(modalias);
>  
>  soundbus_config_of_attr (name, "%s\n");
> +static DEVICE_ATTR_RO(name);
>  soundbus_config_of_attr (type, "%s\n");
> +static DEVICE_ATTR_RO(type);
>  
> -struct device_attribute soundbus_dev_attrs[] = {
> -	__ATTR_RO(name),
> -	__ATTR_RO(type),
> -	__ATTR_RO(modalias),
> -	__ATTR_NULL
> +struct attribute *soundbus_dev_attrs[] = {
> +	&dev_attr_name.attr,
> +	&dev_attr_type.attr,
> +	&dev_attr_modalias.attr,
> +	NULL,
>  };
> 
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